Alarm device



March 8, 1938. F. RILEY, JR 2,110,340

' ALARM DEVICE Filed Aug. 17, 1936 Patented Mar. s, 1938 2,110,340

UNITED STATES PATENT OFFICE ALARM DEVICE Frank Riley, Jr., Houston,Tex., assignor to Miller Fuel Engineering Company, Houston, Tex., acorporation of Texas Application August 17, 1936, Serial No. 96,431

1 Claim. (Cl. 116102) This invention relates to an alarm device. otallyconnected to the latch out beyond its piv- An object of the invention isto provide a device otal connection with the lug ll. of the characterdescribed specially designed to There is a steam pipe I8 extendedaxially be attached to a boiler, and arranged to be actuthrough thenipple 3 and whose outer end is up- 5 ated when the level of the waterin the boiler is turned and connected into the lower end of the 5 belowa predetermined level; it being the purpose nipple 4. The inner end ofthis steam pipe [8 is of the invention to give warning to the attendantalso upwardly curved so that its inlet end will be that the water in theboiler is too low. above the corresponding end of the nipple 3.

It is another object of the invention to provide So long as the level ofthe water in the boiler 10 an alarm device equipped with trip means arisabove the nipple 3, dry steam will be excluded 10 ranged to be releasedby the influence of the from the tube l3 and said tube will not bethereby steam in the boiler when the water reaches a preexpanded inlength suflicient to trip the latch l2. determined level with anactuating device ar- However, as soon as the water level descendssulfiranged to be rendered operative upon release of ciently to admitsteam into the nipple 3, said the trip means, and to thereupon actuatethe steam will pass also into the tube l3 and will 15 alarm. heat andexpand said tube, causing an upward With the above and other objects inview, the 1 1111 On the od "5- T S upwa pull will actuinvention hasparticular relation to certain novel ate the latch l2 outwardly,releasing the free end features of construction, operation and arrangeofthe lever ll permitting the weight 9 todrop, ment of parts, an exampleof which is given in thus opening the valve 5. The inner end of the 20this specification and illustrated in the accomsteam p pe beingupturned, y d y steam will panying drawing, wherein: I be admitted tothe whistle 6 and when the valve Figure 1 shows a side view of theapparatus atis opened, an alarm will be given, indicating the tached tothe boiler, and low level of the water in the boiler. The inner Figure 2shows a sectional view thereof taken end of the steam p p being upturnedW111 P 25 on the line 22 of Figure 1. vent the discharge of waterthrough the whistle 6,

Referring nowmore particularly to the drawing but Will Permit d y St a yto each Said wherein like numerals of reference designate W similarparts in each of the figures, the numeral The drawing d description s oe What is l designates the boiler. There is a T-connection w considered130v be a preferred form f e in- 30 2 which is connected into the boilerbelow the vention, by y f illustration O y, while the normal water l lby means of th t b l nipple broad principle of the invention will bedefined 3, and connected into and upstanding from the y the ppClaimcorresponding end of the T-connection 2, there What I Claim s:

is a tubular nipple 4 which is normally closed by A device of thecharacter described comprising 35 a conventional valve 5 and on which,above the a T-shaped tubular support mounted on the side valve, there ismounted the conventional steam of and adapted to be connected into aboiler, a whistle 6. The valve 5 may be opened by the steam whistle onone arm of said T-shaped tubuvalve actuating lever l which is pivotallymountlar support, a steam pipe extended horizontally ed thereon in theusual way. A chain 8 is atthrough the support into the boiler andarranged 40- tached at one end to the free end of the lever l to supplysteam to the whistle, said steam pipe and said chain is connected at itsother end to having the end thereof which is in the boiler upthe weight9. This weight has a bail I 8 to returned, a normally closed valvecontrolling the ceive the supporting lever II. This lever is pivsupplyof steam from the steam pipe to the oted at one end to the lower end ofthe T-conwhistle, a weight fastened on the lower end of 45 nection 2 andits other end is engaged by the desaid T-shaped support, releasablemeans normally pending pivotally mounted latch [2 whereby the holdingthe weight inactive, means connecting weight is normally held ininactive position. the weight with the valve, means mounted on theUpstanding from the other end of the T-conother arm of said support,arranged to be actunection 2, there is an elongated tube l3 whose atedby the steam from the boiler when the water 50 upper end is closed bythe cap M. The cap M in the boiler reaches a predetermined low level hasa laterally extended lug IE to which the upper and efiective to releasethe weight suspending end of the release rod [6 is connected. meanswhereby the weight is rendered active to The upper end of the latch ispivoted to 2. latopen the valve to permit the discharge of steam erallyextended lug I! carried by the T-connection through said steam pipe. 55

2, and the lower end of the release rod I6 is piv- FRANK RILEY, JR.

